Blood extracting device



May 26, 1953 R. H. VOLGENAU BLoon EXTRACTING DEVICE Filed Nov. 9, 1950 Rober! H. Volgenau INVENToR.

i BY sm/MW Auamtjs Patented May 26, 1953 7 Claims.

The-present invention relates to new and usefulimprovementsy in blood' extracting needles for use in the collection; of blood samples from cattle or other animals.

An important object of this-invention is to providev a spring projected needle working in a barrel and with the rear end of the needle leading to a test bottle held in the rear end' of the barrel andl in which the blood passing through the needle is collected.

A further object is to provide novel trigger releasingy meansv for this spring projected needle and includinga hollow handle slidably carried bythe barrel and connected to the needle and by meansl of which a cleaning solution maybe applied to the needle for cleaning both ends thereof.

A still further object of the invention is to simplify bymechanical means insertion of the needle; to improve the efficiency of collection by greater accuracy in including the needle in` the vein.; to protect the operator from cuts and lacerations due to breakage of thetest tube and to otherwise improve the construction ofthis device.

Other objects and advantages reside in thedetails of construction and operation as more fully hereinafter described and claimedreference being had to the accompanying drawings forming part hereof', wherein. like. numerals, refer to like parts throughout, and in which:

Figure, 1v is a side elevational view;

Figure 2Vr is an enlarged fragmentary long-itudinal sectional view;

Figure 3 isA an enlarged fragmentary transverse sectional View of the hollow. handle for the trigger and taken on the line 3-3 of Figure 2; and

Figure 4 is a fragmentary side elevational view showing a rubber bulb employed for cleaning the needle.

Referring now to the drawing in detail wherein for the purpose of illustration, I have disclosed a preferred embodiment of the invention, the numeral 5 designates a barrel which may be constructed of metal or other suitable material with a threaded plug 6 closing the front end of the barrel and formed with a bore 1.

The rear end of the barrel is also closed by a threaded plug 8 likewise formed with a bore 9, and a test tube holder Il) is threaded on the rear end of rear plug 8.

A rear needle I I is xed in bore 9 of rear plug 8, and is formed at its rear end with a beveled prong I2 projecting into test tube holder I0 to penetrate a rubber plug I3 of a test tube I4 wheninserted inthe holder I0. i

A blood extracting needle I5 is'lslidably mounted at its front end in bore I ofv front plug 61 and. is slidably mounted at its rear end in needle -I I. The front end of needle I5 is also formed withar beveled prong I6.

The needlel 5- extends longitudinally through a bore I7 in a plunger or slide I8, the needle Ice-d ingV suitablyY secured' to the plunger for move-Y nientl therewith. The plunger I8 is slidably mounted in barrel 5 and is provided at itsv rear end' with askirt I@ in which the front end ofi a coil spring;Ztlisipositioned and with the-rear end of the spring' bearing against the rear plug 8i to project plunger mand needlel I5 forwardly.

Plongery IB is formed with av lateral passage 21'- connectedV to needle I-5 by means of an opening in theneedle and a hollow handle 221 is thread-` ed to onev side of; plunger I8 for connection with* the passage 2 Ii thereof;

.Ai valvel seat 2li is` formed in handle 22 against which azhall` checkv valve 2E? is held by a coil spring 26: to close-the passage 2 I- and passage 21 leadingthrough the hollowk handle 221. The outer end of passage 2'I- in the handle 22' is flared as-shown at 28, and' theI outer end of thehandleis formed with'a knurlednger gripping head-291.

Handle- 22' is slidable i'nl a longitudinal slot 3i)L in barrel 5 and is adapted to enter a circumferen-4 tial lockinge slot 3`I at the rear endl of slot 30 to' lock the needle Il in its retracted position andf'with spring 2li compressed-behind plungerl I8.

Theouter end of front plug 6 is formed' with. a ne'ckfZ-v towhicha tubular shield 33 isfsecuredlA to protect the# front end of'needle I5, when. notzin use:

In the operation of the device, the trigger handle 22 is released from locking slot 3| to slide forwardly in slot 30 and to hold the needle I5 in a forwardly projected position. An empty test tube I4 is then placed in holder IIl and rear needle II formed through the plug i3 of the test tube, as shown in Figure 2 of the drawing.

Blood extracting needle I5 is then retracted by sliding handle 22 rearwardly and locking the same in slot 3| and the neck 32 or" front plug 6 is then placed against the neck or other suitable part of the animal. Trigger handle 22 is then released from locking slot 3I and spring 2t projects needle I5 forwardly to enter a vein in the animals neck and blood therefrom then flows through the needle I5 into the test tube III.

Test tube holder I0 is formed with a window opening 34 by means of which the filling of the 3 test tube I4 may be obersved and when a desired sample of blood has been collected in the test tube the needle I5 is withdrawn from the animal and the test tube removed from holder I0.

The needles Il and l5 are cleaned by placing the nozzle 35 of a rubber bulb 36 filled with a cleaning solution in ared opening 28 of handle 22 and pressure subjected to the bulb will force valve 25 open and the cleaning fluid forced through both needles.

In View of the foregoing description taken in conjunction with the Iaccompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is tof be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A blood extracting device comprising a barrel, a spring ejected extracting needle slidably supported in the barrel for movement inwardly and outwardly at the front end thereof, a test tube holder at the rear end of the barrel adapted for receiving a test tube having a stopper at its front end, a needle supporting member at thel junction of the barrel and test tube holder, a rear delivery needle having a sliding connection with the extracting needle and fixed in the needle supporting member in the path of inserting movement of the test tube into the holder and adapted to puncture the stopper of the test tube to deliver blood thereto from the receiving needle, and means slidably carried by the barrel for cooking and releasing the extracting needle.

2. A blood extracting device comprising ya barrel, front and rear tubular needles in the barrel and connected to each other for delivering blood entering the iront needle to the rear needle, means within the barrel projecting the front needle independently of the rear needle into extracting position, and a test tube holder at the rear of the barrel adapted to receive and hold a test tube in position for connection with the rear needle. i

3. A blood extracting device comprising a barrel, a slidable front tubular needle in the barrel, a xed rear tubular needle in the barrel, said needles being connected to each other for delivering blood entering the front needle to the rear needle, means projecting the front needle independently of the rear needle into extracting 4 position, and a test tube holder at the rear of the barrel adapted to hold a test tube in a position for the insertion of the rear needle therein.

4. A blood extracting device comprising a barrel, a spring ejected needle slidably supported in the barrel for movement inwardly and outwardly at the front end thereof, a rear needle fixed in the barrel in telescoping relation with the front needle, means supporting a test tube at the rear of the barrel in a position for puncturing the stopper of the test tube by the rear` needle, and manual releasable means connected to the front needle and holding the latter in retracted position in the barrel.

5. A blood extracting device comprising a barrel, a spring ejected hollow extracting needle slidably supported in the barrel for movement inwardly and outwardly at the front end thereof, a rear hollow delivery needle fixed in the barrel in telescoping relation with the front needle, and a valved hollow handle connected to the bore of the front needle for manually retracting the latter and adaptedto receive a cleaning uid to clean both needles. Y

6. A blood extracting device comprising a barrel, a front extracting needle slidably mounted in the barrel for movement inwardly and o-utwardly at the front end of the latter, ya rear delivery needle fixed in the rear end of the barrel in constant communication with the extracting needle, a funnel member projecting from one side of the barrel and connected to one of the needles and adapted to receive a cleaning fluid to clean both needles, and valve means` in said funnel member to cut oii` reverse flow therethrough from the needles.

7. A blood extracting device comprisinga barrel, a front extracting needle slidably mounted in the barrel for movement inwardly and outwardly at the front end of the latter, a rear delivery needle flxed in the rear end of the barrel in constant communication with the extracting needle, spring means in the barrel for projecting the extracting needle, and means carried by the barrel for cooking and releasing the extracting needle.

ROBERT H. VOLGENAU.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,458,958 Schneider June 19, 1923 A 1,845,930 Morrow Feb. 16, 1932. 2,399,011 Erickson Apr. 23, 1946 2,437,408 Saet Mar. 9, 1948 2,460,641 Kleiner Feb. 1, 1949 

